Duolingo gives a sentence:
"You will have to not make a lot of errors during the exams."
The sentence is awkward and the given answer is:
"Il ne faudra pas faire beaucoup d'erreurs pendant les examens"
but It also accepts:
"Il faudra ne pas faire beaucoup d'erreurs pendant les examens"
as you suggest it should be above. Are both forms acceptable when negating the first of double verbs, is this a unique situation, or is there another explanation?